If you are running into video playback issue, please try another browser. Our video player does use HTML5 and will not require any add-ons or plug-ins to run. Also, I would confirm you are running a support browser, which is the last three version of Internet Explorer / Edge (Edge, IE11 and IE10) and the most recent versions of FireFox, Chrome and Safari.
If that does not help, you can make sure you are able to access our video on your network. To do this, you should open a video, then open your browser's diagnostic tools by hitting F12 or through your browser's menu. From there, go to the network tab, then refresh the page. You should see either an entry follow the structure below.
If you have trouble, you should be able to search "vid" to isolated these requests. If you see any responses besides 200 or 206, I would reach out to your network team and see if they can whitelist *.pluralsight.com.
If you still have trouble, please email email@example.com with the steps you have tried already, then we will move forward from there.